Frequencies for first 10,000 rows of pct012n137 variable in sf12010860us33 dataset :

   30 years |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,957       89.57       89.57
          1 |        636        6.36       95.93
          2 |        171        1.71       97.64
          3 |         88        0.88       98.52
          4 |         49        0.49       99.01
          5 |         30        0.30       99.31
          6 |         11        0.11       99.42
          7 |         14        0.14       99.56
          8 |          8        0.08       99.64
          9 |          5        0.05       99.69
         10 |          4        0.04       99.73
         11 |          2        0.02       99.75
         12 |          3        0.03       99.78
         13 |          2        0.02       99.80
         15 |          2        0.02       99.82
         16 |          2        0.02       99.84
         17 |          1        0.01       99.85
         18 |          1        0.01       99.86
         19 |          2        0.02       99.88
         20 |          1        0.01       99.89
         22 |          2        0.02       99.91
         24 |          1        0.01       99.92
         25 |          2        0.02       99.94
         30 |          1        0.01       99.95
         31 |          1        0.01       99.96
         37 |          1        0.01       99.97
         46 |          1        0.01       99.98
         47 |          1        0.01       99.99
         70 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 17 Apr 2017